Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"cement treated"”.
-
Constitutive behaviour of cement treated marine clay
Cement-soil stabilisation has been widely used to improve engineering performance of clayey soils in various applications. This thesis investigates the microstructure and macroscopic behaviour of laboratory prepared cement treated clay specimens that were cured under atmospheric, undrained and …
-
Early Age Assessment of Cement Treated Materials
… to avoid the occurrence of early-age damage, cement-treated base (CTB) materials must be allowed to cure for a period of time before the pavement can be opened to traffic. The purpose of this research was to evaluate the utility of the soil stiffness gauge (SSG), heavy Clegg impact soil tester …
-
Contractor Variability in Construction of Cement Treated Base Layers
… correlated to specific mechanical properties of cement-treated base (CTB) layers and to determine which construction factors exhibit comparatively high variability within individual construction sections of the two pavement reconstruction projects included in this study. In addition, differences …
-
EFFECTIVE STRESS RANDOM FINITE ELEMENT ANALYSIS OF CEMENT-TREATED CLAY GROUND
This study dealt with the random behavior of cement-admixed soil. In this thesis, an advanced constitutive model for cement-admixed soil was firstly incorporated in finite element program. Then the numerical model was recalibrated and validated using cell test results. Parametric studies were …
-
Evaluation of lower quality recycled PCCP for Portland Cement Treated Base (PCTB)
… to incorporate these aggregates into Portland cement treated base (PCTB). KDOT currently practices a freeze-thaw method that includes 90 days of curing and a maximum of 660 freeze-thaw cycles to determine the durability of its concrete pavements and bases. An experimental study was conducted to …
-
Cracking and Roughness of Asphalt Pavements Constructed Using Cement-Treated Base Materials
While cement treatment is a proven method for improving the strength and durability of soils and aggregates, cement hydration causes shrinkage strains in the cement-treated base (CTB) that can lead to reflection cracking in asphalt surfaces. Cracking may then cause increased pavement roughness and …
-
Use of the Clegg Impact Soil Tester to Access Rutting Susceptiblity of Cement-Treated Base Material Under Early Trafficking
… to avoid the occurrence of early-age damage, cement-treated base (CTB) materials must be allowed to cure for a period of time before the pavement can be opened to traffic. Trafficking of a CTB before sufficient strength gain has occurred can lead to marring or rutting of the treated layer. The …
-
Influences of Curing Conditions and Organic Matter on Characteristics of Cement-treated Soil for the Wet Method of Deep Mixing
The wet method of deep mixing constructs binder-treated soil columns by mixing a binder-water slurry with soft soil in-situ to improve the engineering properties of the soil. The strength of binder-treated soil is affected by characteristics of the in-situ soil and binder, mixing conditions, and …
-
Influence of Curing Temperature on Strength of Cement-treated Soil and Investigation of Optimum Mix Design for the Wet Method of Deep Mixing
… properties of soil by blending the soil with a cementitious binder. Laboratory specimens were prepared to represent soil improved by the wet method of deep mixing, in which the binder is delivered in the form of a cement-water slurry. To study the influence of curing temperature on the strength …
-
Characterization of High Porosity Drainage Layer Materials for M-E Pavement Design
… properties of the laboratory-compacted asphalt treated and cement treated permeable base specimens. The modified test protocols to determine the dynamic modulus of the drainage layer materials have been provided, which can be followed to determine the dynamic modulus of the drainage layers as …
-
Influences of Test Conditions and Mixture Proportions on Property Values of Soil Treated with Cement to Represent the Wet Method of Deep Mixing
A laboratory testing program was conducted on cement-treated soil mixtures fabricated to represent materials produced by the wet method of deep mixing. The testing program focused on investigating the influences that variations in laboratory testing conditions and in the mix design have on measured …
-
Evaluation of Laboratory Durability Tests for Stabilized Aggregate Base Materials
The Portland Cement Association commissioned a research project at Brigham Young University to compare selected laboratory durability tests available for assessing stabilized aggregate base materials. The laboratory research associated with this project involved two granular base materials, three …
-
Composite Pavements: A Technical and Economic Analysis During the Pavement Type Selection Process
… two proposed composite pavements (one with a cement-treated base [CTB] and the other with a continuously reinforced concrete pavement [CRCP] base) to traditional flexible and rigid pavement structures. Furthermore, sensitivity analyses involving discount rates and traffic volumes were …
-
Soft Soil Stabilisation Using a Novel Blended Cementitious Binder Produced From Waste Fly Ashes
… compressive strength and high compressibility. Cement is the most commonly used binder for soil improvement applications in the UK and worldwide due to its high strength performance. However, its manufacture is energy intensive and expensive, contributing approximately 7% of global carbon …
-
Cement Stabilization of Aggregate Base Materials Blended with Reclaimed Asphalt Pavement
… of reclaimed asphalt pavement (RAP) content and cement content on the strength and durability of recycled aggregate base materials. Specifically, the unconfined compressive strength (UCS) and final dielectric value in the Tube Suction Test (TST) were measured in a full-factorial experimental …
-
Remediation of contaminated land and solutions with binders derived from waste material.
… in the laboratory and to which ordinary Portland cement (OPC), lime, magnesia, fly ash (PFA), or ground granulated blast furnace slag (GGBFS) were added to stabilise the contaminant. The optimum amounts were determined by fly ash added gradually to contaminated soil until full reduction of …
-
Machine Learning Approaches for Improving Construction Materials and Pavement Systems
… predict the unconfined compressive strength of cement-treated soil for deep mixing. Deep-mixed soil plays a crucial role in reinforcing weak clay soil, which is a common construction problem. The results demonstrated that ML models can enhance the accuracy of forecasts significantly, relative to …
-
Impact of pavements on the urban heat island
… Urban Heat Island (UHI) is caused by the replacement of natural materials with man-made ones such as concrete and asphalt, among other factors. UHIs can be studied at three elevations – surface, canopy layer and boundary layer – with Canopy Layer UHIs (CLUHIs) being the most significant as most …
-
Design and Construction of Pavements in Cold Regions: State of the Practice
The effects of frost action introduce many challenges in the design and construction of roadways in cold regions throughout the United States. The penetration of frost into pavement structures can lead to differential frost heave during winter and thaw weakening during spring. Both of these damage …
-
Sustainable pavement applications utilizing quarry by-products and recycled/nontraditional aggregate materials
… over soft subgrade soils; (3) using QB as a cement or fly ash-treated subbase (e.g., in inverted pavements); (4) using QB as a cement-treated base material; and (5) for base course applications, blending QB with coarse aggregate fractions of recycled materials and stabilizing the blends with …